Sealing device for box straps



I Nov. 15, 1927. 1,649,363

S. W. PARSONS SEALING DEVICE FOR BOX STRAPS Filed March 26, 1927 Patented N69. .15, 1927.

UNITED STATES I 1,649,363 PATENT OFFICE. I

STUART W: PARSONS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE STANLEY WORKS, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

snALme DEVICE mm BOX swan-rs.

a ncmbn and March as, 1927. Serial No. 178,801.

This invention relates to a device for applying toa box strap, forsecuring the same 111' place, a seal such as is disclosed in my Patent No. 1,533,? 91, granted September 15,

The aim of the invention. is to provide a device of this sort whereby the seal may be quickly and easily applied or formed to securely hold the ends of the strap together. A further aim of the invention is to provide simple, cheap and effective means for forming a seal such as disclosed in my said patent. 4 Other objects will be, in part, obvious and in part pointed out hereinafter.

The invention, accordingly, consists in the features of construction, combination of elements and arrangement of parts which will be exemplified in the construction herein-- after set forth and the scope of the application of which will be indicated int e appended claim. I I

In the accompanying drawings, wherein I have shown for illustrative purposes, one

2 embodiment which the present invention may take, Figure 1 is parts in section, of a sealing device in which mygimp'rovements are incorporated;

ig. 2 is a front view of the'device;

Fig. 3 is a sectional view taken 1ongitudi nally and centrally through the dies, this View being taken on line 33 of Fig. 4;

Fig. 4 is a transverse section through the 85 dies this view being taken on line 44 of F ig. 3; and I Fig. 5 is a perspective View of the seal applied to the overlapping ends of the strap. Referring to the drawings in detail, 10

designates a frame of suitable construction,

this frame in the present instance having arearwardly extending arm 11 which is slotted as at 12, so thatthe portion 13- of the arm constitutes a grip portion which mayv be grasped-by the fingers of the operator when the operating lever or handle 14 has been moved adjacent thereto. Extending forwardly from the body portion of the frame is a pair of vertical webs 15 between which is positioned for sliding movement a ferrule die or punch 16. Secured to the frame is a base plate 17 which extends forwardly beneath the die 16. Thisplate carries a male punch or die 18. Preferably the die18 is removable'so that it can be easily a side elevational view, with resharpened or renewed after it has become worn. In the present instance, this dieis secured by a screw 20 in a groove 19in the upper face of the plate. The female die or punch 16 is held in place between the webs 15 by a face plate 21' secured to the front edges of the webs 15 by screws 22. The upper end of the female die 16 is bifurcated and journalled in this bifurcation is an antifriction roller 25 with which cooperates a cam 26 provided on the operating lever 14.

The lever 14 is journalled on a pin 27 supported in the upper ends oft-he webs 15.

The die is normally urged into raised position by means of a leaf spring 28 secured to the arm 11 and having its free end extend- (iing 1into a notch 29 in the rear face of the Referring now to the specific construction of the dies, the upper die is in the form of a block having its lower end provided with a groove 30 the side walls of which are vertical and terminate in cutting edges 31'. These cutting edges extend transversely of the strap S during the sealing operation. The lower or male die 18 has a projection 32 which is in the form of a truncated triangular rib, the rib having vertical end walls which terminate in cutting edges 33, The rib is ofsubstantially the same width as thegroove 30. The rib has its front and rear faces 34 and .35 tapered toward one another and the upper face 36 of theri-b is preferably flat.

'My improved dies form the seal shown in perspective in Fig. 5 and in section in Figs. 3 and 4. The sealing member, designated generally by the letter M is initially inthe form of a relatively short flat tube split longitudinally on the medialline of its bottom wall. To secure the strap Sin position on the box, the strap is placed about the box and its opposite ends are threaded through the sealing member. After the strap is drawn taut, the sealingmember with the ends of the strap extending therethrough, is placed between; the dies and the operating handle 14 is thrown rearwardly and downwardly thereby causing the female the cooperating pairs of cutting edges 31 and 33. Owing to the shape of the die projection 32, the metal between the slots is arched so as to form a plurality of superimposed bridges. The bridge 40 in the upper wall of this sealing member, the bridge a1 of. the over-lying strap end, and the bridge 42 of the underlying end are continuous or unbroken. lhe bridge in the lower wall of the sealing member is in the form of tabs 43 as shown in Fig. 3. In forming the bridges, the metal constituting the bridges and also the metal of the'strap ends and the sealing member to each side of the bridges are very closely pressed together, so that, in a sense, they bind against each other.

From the foregoing description taken in connection with the accompanying drawings it will be seen that my improved device is very simple in construction and that it will operate upon the sealing members and the over-lapping straps in such manner as to form a very efiective and secure seal.

I claim as my invention: In a sealing device for box straps, a female die having a groove with substantially parallel straight side walls terminating in cutting edges, and a male die having substantially parallel side faces terminating in cutting edges arranged to respectively cooperate with-the cutting edges of the female die to-form spaced slits in the metal positioned between the dies, said male die having a truncated triangular shape in longitudinal section.

STUART W. PARSONS. 

